Tenn. Code Ann. § 29-15-125

In order to establish a rebuttable presumption of legal title to real property for the purpose of bringing an action of ejectment, it shall be sufficient for a person claiming legal title to establish the chain of title to the property for the preceding fifty (50) years in any instance where the property title records of the county have been destroyed so as to make it impossible to trace the title of the property to the earliest sale or grant.